Question

tiO, each day it expels l 0omposed of fur, bones, and sometimes cartilage. By examining owl pellets, ecologists would be able to determine a. the carnivores that affect owls population b. organisms that feed on owls c. autotrophs that owls prefer d. consumers that owls prefer e. both a and e From an environmental perspective,the dominant species in a community is A) characterized by very large individuals with long lives B) the best competitor in the community C) the best predator in the community D) the species that contributes the most biomass to the community E) the most energetically efficient species in the community 46. The population change in a particular year can be calculated by a. (deaths+ emigration) (deaths immigration) b. (births+ immigration)- (deaths+ emigration) c. (deaths+ immigration)-(births+ emigration) d. (births - deaths) + (emigration-immigration) e. (births+immigration)-(births+ emigration) 47. The organisms that make their food from gas and sunlight are a. phytoplanktons b. cmnivores c. detritus feeders d. carnivores e. herbivores a population b. biome c. biosphere d community e species 50. The major cause of reduced buman life span today is a smokingb. poverty c.cancer d.high cholesterol e. accidents your answers to questions S1 and 52 on the diagram below Base S1. The dingram shows a food web. Which organisms would most likely be competitors? a. Aand C b. Band C c, B and D d. Dand E e. Aand B 52. Which organisms are secondary consumers? a. A and C b. Band C c. B and D d. Dand E e A and B 53. Water pollution can be caused by all of the following except a. sewage b point source poliutants d pesticides e. legal dumping of industrial waste c. fertilizers from farmland in the mountains 54. A person experiencing a. a chronic exposure d. both a and c dizziness after using a strong household cleaner is showing b, an acute exposure e, none is correct c. subchronic exposure 55. The process of photosynthesis a sunlightb. water vapor requires the substrates carbon dioxide, water and c.sulfur dioxide d. oxygen e. heat

Answer 1

Ans 46. D). The special which con tribute to most biomass in the community.

Ans 47. (Birth+immigration) -(death + emigration)

Ans 48. A). Phytoplanktons

As they have chlorophyll, so they are able to perform photosynthesis.

Ans 49. d) community

Ans 50. b). poverty

Ans 51. d) D and E. As they have common prey.

And 52. d) D and E.

And 53. e) legal dumping of industrial waste to water sources.

Ans 54. b) an acute exposure.

Ans 55. a). Sunlight